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- From: ron@celece.ucsd.edu (Ron Katznelson)
- Newsgroups: rec.video.cable-tv
- Subject: Re: Why can't I use the neat features on my new TV?
- Message-ID: <2387@deadmin.ucsd.edu>
- Date: 2 Jan 93 06:08:23 GMT
- References: <1h5plgINN6u0@gap.caltech.edu> <4625@vidiot.UUCP>
- Sender: news@deadmin.ucsd.edu
- Distribution: usa
- Organization: UCSD Division of Engineering
- Lines: 59
-
- In several submissions to this Newsgroup, comments were made about
- the ever-growing consumer electronics interface problems associated
- with CATV set-top descramblers. Mention was also made of the
- recently enacted Cable Act of 1992, directing the FCC to consult
- with the Cable and the Consumer Electronics industries and
- promulgate rules that specifically solve this problem. Some have
- also questioned whether there is a technical solution in sight.
-
- Well, it turns out that there are several solutions using channel
- traps and signal Interdiction devices which, unfortunately for the
- cable operators, require the signals to be sent in the clear on the
- cable system and require costly installation at every subscriber
- location.
-
- Recently, however, a San Diego based company - Multichannel
- Communication Sciences, Inc. ("MCSI") has developed a new broadband
- descrambling technology described in recent articles in
- "Multichannel News" (June 1, 1992 page 26 and November 9, 1992 page
- 39) and in CED Magazine in an article entitled "Reregulation and
- the Consumer Interface" (December, 1992 page 32).
-
- MCSI recently demonstrated an economically viable technology that
- will become available for cable system operators to provide their
- subscribers with a truly "subscriber friendly" broadband signal
- security system, by allowing cable operators to keep their signals
- scrambled while avoiding the need for set-top descramblers.
- Digital Broadband Descrambling ("DBD"), a newly developed digital
- technology for simultaneous on-channel processing of large number
- of TV signals, utilizes advanced digital signal processing ("DSP")
- methods for effecting such low cost broadband access control. It is
- compatible with most RF and Baseband sync suppression scrambling
- formats.
-
- Unlike existing "single-channel-at-a-time" descrambling
- technologies, an MCSI addressable device may be installed on the
- side of the house or at a point of entry and it simultaneously
- descrambles an arbitrarily selected set of scrambled channels. It
- provides all authorized channels in the clear and thus enables
- subscribers to enjoy all the features of their cable ready TVs and
- VCRs in a whole-house service, including built-in VCR programming
- functions, remote controls, watching and recording from different
- scrambled channels simultaneously or consecutively, and viewing
- multiple channels at once (picture-in-picture).
-
- Unlike set-top descramblers currently in use, the MCSI system does
- not employ single channel filtering or video demodulation-
- remodulation circuitry and thus introduces no measurable frequency
- response distortions or artifacts in either the video or audio
- signals of the descrambled and non-blocked channels. Therefore,
- video and audio quality at the subscriber terminal is virtually
- that which is provided at the head-end.
-
- A technical paper on this system will be presented at the NCTA
- Technical Conference in San Francisco (June 6-9, 1993).
-
-
-
- Happy New Year to you all
- from Ron Katznelson
-